In this talk Olaf Janssen explains how and why joining forces with Wikipedia fits in the bigger open data strategies of the Koninklijke Bibliotheek. Starting from a brief historic overview of its Wikipedian-in-Residence project in 2013-14, he not only explains how the KB has been collaborating with Wikipedia and its volunteer community over the last couple of years, but also which positive impacts it has had for the exposure, distribution and reuse of KB's collections. Sharing is Caring – Brussels Extension: Opening up with Wikimedia took place on 20 June at the Royal Institute for Cultural Heritage in Brussels. This conference introduced the Belgian heritage sector to the possible applications of the various Wikimedia platforms for opening up digital collections. The conference showcased examples from museums, libraries and archives from Belgium and abroad. Sharing is Caring is a conference platform focused on collaboration and sharing in the cultural heritage sector, bringing together practitioners, ...